def bool_xx
import bend-osdev-aead@0.1.0.0/PROOF.bend as PROOFimport Base
38def bool_xx(a: Bool, b: Bool) -> {a == Bool.xor(Bool.xor(a, b), b) : Bool}:
39 match a b:
40 case True{} True{}:
41 {==}
42 case True{} False{}:
43 {==}
44 case False{} True{}:
45 {==}
46 case False{} False{}:
47 {==}